title: Fibrodysplasia ossificans progressiva. Report of two cases with ultrastructural study.
mesh_terms: D000328:Adult; D000844:Ankylosis / Q000473:pathology; D005260:Female; D006801:Humans; D008336:Mandibular Diseases / Q000473:pathology; D008854:Microscopy, Electron; D009132:Muscles / Q000473:pathology; D009221:Myositis Ossificans / Q000473:pathology*; D013705:Temporomandibular Joint Disorders / Q000473:pathology